The only problems I have ever had with stock ignition on a GMC came from a worn out distributer. A Pertronix kit won't fix that. I have never been left on the side of the road by a points set up but I have by Petronix and Mallory Unilite. It's not like that 248 is going to be turning 8 grand. At this time I am running a Unilite but there is a spare module in the glove box and a complete points distributer and coil under the seat. The benefit of electronics here is maybe a little easier starting and you don't have to maintain the points.
Is it still 6 volt positive ground? I'd change that.
